getDrawGraphics

Creates a graphics context for the drawing buffer. This method may not
be synchronized for performance reasons; use of this method by multiple
threads should be handled at the application level. Disposal of the
graphics object obtained must be handled by the application.

the graphics on the drawing buffer. This method may not
be synchronized for performance reasons; use of this method by multiple
threads should be handled at the application level. Disposal of the
graphics object must be handled by the application.

revalidate

protected void revalidate()

Restore the drawing buffer if it has been lost

contentsLost

Returns whether the drawing buffer was lost since the last call to
getDrawGraphics. Since the buffers in a buffer strategy
are usually type VolatileImage, they may become lost.
For a discussion on lost buffers, see VolatileImage.

contentsRestored

Returns whether the drawing buffer was recently restored from a lost
state and reinitialized to the default background color (white).
Since the buffers in a buffer strategy are usually type
VolatileImage, they may become lost. If a surface has
been recently restored from a lost state since the last call to
getDrawGraphics, it may require repainting.
For a discussion on lost buffers, see VolatileImage.

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dispose

public void dispose()

Releases system resources currently consumed by this
BufferStrategy and
removes it from the associated Component. After invoking this
method, getBufferStrategy will return null. Trying
to use a BufferStrategy after it has been disposed will
result in undefined behavior.